I just changed my oil to the new mobil supersyn w k&N gold oil filter. They do not have 5w20, so I had to use 5w30. Any disadvantages of running 5w30 instead? The engine seems to be running a little smoother and quieter (of course it could be psycological).


Later

 

most people run 10w-30 or 15w-50 so not you won't have any problems.

 

You are perfectly fine using Mobil 5w30 in your L.

joe

 

I asked around here (ford) and the 5w-20 thing is nothing more than for fuel economy.

I'll be switching to 5w-30 mobil 1 at the 2,500 mile mark.

WOT

 

I have heard of some leaking problems after changing to synthetic, has anyone here had any problems??
I have 22.5k miles on my 99 now and plan to swicth to Mobil on my next oil change. As far as I know, it has always had normal oil in it.

 

Hey brasil... I think we're modding at the same rate... I just made the switch a week ago as well. Now you need the bassani... just ordered mine

 

If all your eng. gaskets and seals are 'whole' and in place, you won't have any leaks. Syn. oil has a more aggressive detergent agent to clean the eng. better and sometimes can remove an oil contaminat that is blocking a potential leak. The detergent might dssolve this contaminat opening up a leak........

There are no disadvantages to using a synthetic oil, only advantages. I started with Mobil 1 in the 70s and every vehicle I've owned has benefited from it.

Dan

 

5w-20 not only gives a tidge more fuel economy (you'll never notice it), but it is thinner so more performance should be afforded as well.

I recommend Royal Purple 5w-20. It's new so most will not have that viscosity in stock. They can order it, though. Go to www.royalpurple.com

I know all synthetic oil manufacturers claim their's is the best, but I honestly believe you can't do better than RP. It's price is about 5 bucks a quart, too. Hardly anymore than a bottle of Mobil 1.

 

I agree with bfb!! royal purple is the chit!!!

 

I bought the mobil supersyn at costco (6 quarts for $21.99), so it was quite a bit cheaper than $5 per quart. ANimal, I will be deciding on the exhaust soon. Let me know how you like your bassani.

Later

 

38k and no leaks yet.

 

I would stay with the Motorcraft 820s filter.It has a silicone anti-siphon valve it it.
have heard of many having the "can of marbles' sound develop with aftermarket filters.Myself included.Swithed back and it went away.
I also Pre-fill the filter with fresh oil before install.It'll take almost 3/4 qt.Then before you start the truck,hold the accelerator to the floor and crank it over for 30-45 sec.then let off the accelerator and start as usual.
hope this helps!

 

Just changed my oil and Motorcraft filter two hours ago. Been using Mobil 5w-30 for about 17k w/no leaks, always has ran smooth and quiet.

 

This will keep the truck from cranking?

 

yea, i didnt understand that part either..